Direct mail advertisers send solicitations​ ("junk mail") to thousands of potential customers in the hope that some will buy the​ company's product. The response rate is usually quite low. Suppose a company wants to test the response to a new flyer and sends it to 1020 people randomly selected from their mailing list of over​ 200,000 people. They get orders from 109 of the recipients.  A) ​Create a 90% confidence interval for the percentage of people the company contacts who may buy something.

Q: Use a= .05 and one tailed test  t= -5.00, df= 5. reject, fail to reject

A: Given α = 0.05, two tailed test, t = -5 and degree of freedom = 5.For a two tail test if test…

Q: In your work for a real estate company, you find that in a sample of 1762 home buyers, 722 found…

A: Given Data: x=722 n=1762   p^=7221762=0.4098

Q: The figure to the right shows the results of a survey in which 1011 adults from Country​ A, 1003…

A: Note- As per our policy we can answer only the first 3 sub-parts of a question. If you want…

Q: A poll asked college students in 2016 and again in 2017 whether they believed the First Amendment…

A: In 2016, 2087 of 3103 students surveyed said that freedom of the press was secure or very secure. In…

Q: In a survey of 1250 U.S. adults, 363 said that their favorite sport to watch is football. The 95%…

A:

Q: A phase three clinical trial for a new medication proposed to treat depression has 1191…

A: It is an important part of statistics. It is widely used.

Q: Public Policy Polling recently conducted a survey asking adults across the U.S. about music…

A: Given data  N = 571 X = 80 99% confidence interval

Q: In studying his campaign plans, Mr. Singleton wishes to estimate the difference between younger…

A: sample size(n1)=769x1=497sample size(n2)=703x2=390confidence level=90%

Q: A Pew Internet Project Data Memo presented data comparing adult gamers with teen gamers with respect…

A: There are two independent samples which are adult gamers and teen gamers. We have to construct 95%…

Q: As Senior Class President, one of your lifelong duties is overseeing the planning of your high…

A:

Q: A student polls his school to see if students in the school district are for or against the new…

A: Given: n=600 and x=480. Then,p^=xn=480600=0.8

Q: Kiyo is confused. He has constructed a 90% confidence interval for the average age of students at…

A: Answer: Given that:     Kiyo is confused. He has constructed a 90% confidence interval for the…

Q: Does a new diet plan help people lose weight? Twenty people were weighed before starting a 3-month…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A health magazine is interested in knowing the population proportion of people who eat fast food…

A:

Q: Out of all the students that attend Yale University, 1,982 were selected to participate in a school…

A:

Q: A researcher wanted to check whether the percentage of Canadian adults with obesity has decreased in…

A: Number of Canadian adults in 2005= 75 Number of Canadian adults in 2009 = 120   significance level =…

Q: At a large university in Conway, South Carolina, the Dean wants to know what proportion of students…

A: We have given thatn = 200x = 145Confidence level (c) = 99% = 0.99Significance level (α) = 1 - c =  1…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: A recent survey of 54,000 randomly selected adults studied the religious affiliations of Americans.…

A: From the provided information, Sample size (n) = 645 From which 116 said they claimed no religious…

Q: 324 out of a simple random sample of 400 students hated their online math course. Find a 99%…

A: Given: Number of students that hated the online math course (y) = 324 Number of students (n) = 400…

Q: The analyst decides to test this assumption by collecting a random sample of 100 New Yorkers and…

A: The sample proportion is, p^=xn=65100=0.65 Computation of critical value:…

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: The formula of sample size is, Use EXCEL Procedure for finding the critical value of z.   Follow…

Q: Thelma and Louise are each attempting to estimate the proportion of adults who enjoy listening to…

A: Given that.  p=0.29 C.I for Thelma's=(0.242 , 0.338) C.I for Louise's=(0.237 , 0.323)

Q: The branch manager of an outlet store​ (Store 1) of a nationwide chain of pet supply stores wants to…

A: Comment: As per the our company guidelines we are supposed to answer only three subparts. Kindly…

Q: The figure to the right shows the results of a survey in which 999 adults from Country​ A, 1006…

A: Hey, since there are multiple subparts posted, we will answer the first three subparts. If you want…

Q: Out of 800 adults selected randomly from one town, 272 have health insurance. Find a 90% confidence…

A: Given,   The sample proportion is,

Q: A survey of 300 women shoppers found that 17% of them shop on impulse. What is the 80% confidence…

A: From the provided information,A survey of 300 women shoppers found that 17% of them shop on impulse.…

Q: In a survey of 1,626,773 U.S. adults, 49,311 personally identified as lesbian, gay, bisexual, or…

A:

Q: Suppose we have the results of a Gallup survey (simple random sampling) which asks participants for…

A:

Q: 5. At Community Hospital, the burn center is experimenting with a new plasma compress treatment. A…

A: It is given that  For sample 1: Favourable cases, X1 = 259 Sample size, n1 = 316 For sample 2:…

Q: wenty years ago, a very famous psychologist specializing in marriage counseling authored a book…

A: Solution: Given information n= 275 Sample size of couples who bought book. X= 217  stayed together…

Q: Refer to the following scenario. An epidemiologist is worried about the prevalence of the flu in…

A: To find the sample size required for estimating the population proportion with a 95% confidence…

Q: A marketing survey involves product recognition in New York and California. Of 679 New Yorkers…

A: given data  n1 = 679    x1 = 256p^1 = x1n1 = 256679 = 0.3370 n2 = 631    x2 = 208 p^2 = x2n2 =…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A:

Q: Find a 95% confidence interval for the proportion of the entire voter population who approve or…

A:

Q: A high school is running a campaign against the over-use of technology in teens. The committee…

A: sample size(n1)=200sample proportion()=0.85sample size(n2)=180sample proportion()=0.55confidence…

Q: A certain coffee packing company has three packing lines with the following production volumes of…

A:

Q: f 260 employees selected randomly from one company, 18.46% of them commute by carpooling. Construct…

A: Given data, n=260 p=18.46% =0.1846 z-value at 98% confidence is Zc=2.326

Q: In the past, 70% of a garage's business was with former patrons. Clarence Wade, the owner of the…

A: Solution: Given information: n= 600 Sample size  x = 432 Successes  p^=xn=432600= 0.72 Sample…

Q: Kit and Casey are each attempting to estimate the proportion of college students who can play at…

A: Given Information:- P(At least one musical instrument) = 0.35 Kit's confidence interval = (0.308,…